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a textarea is a part of my form. The user has to write a little text and I want to validate this text. For now I am using the following regex:
/^[0-9a-zA-ZäöüÄÖÜ_\-']+$/
Although I have mentioned the äöüÄÖÜ in the regex it handles all words with äöü.. as invalid. Furthermore it does not accept empty spaces.
Any ideas how to improve the regex?
Use a Unicode-aware regex: